The gravitational potential difference between the surface of a planet and a point 20 m above the surface is 2 joule/kg. If the gravitational field is uniform, then the work done in carrying a 5 kg body to a height of 4 m above the surface is (a) 2 J (b) 20 J (c) 40 J (d) 10 J
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Explanation:
The potential difference for a distance of 20m is 2 joule/kg.
W = (4/ 20 )x 10
= 2J
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